# managarm/managarm

Pragmatic microkernel-based OS with fully asynchronous I/O

Repository: https://github.com/managarm/managarm
Canonical: https://ross.abutalabs.com/products/managarm
Language: C++
License: MIT
License Family: permissive
Topics: operating-system, microkernel, asynchronous-io, posix-compatible, modern-cpp, x86-64, hacktoberfest
Last push: 2026-08-26T20:05:28+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 3705, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1969, forks 106 (observed 2026-08-28T04:06:00.709803+00:00)

## What it is
Managarm is a pragmatic microkernel-based operating system written in modern C++ with a fully asynchronous I/O API. It provides POSIX and Linux user-space API compatibility (epoll, signalfd, tmpfs, /proc, /sys) while running its own non-Linux kernel.

## Use cases
- try a microkernel OS with POSIX compatibility
- study asynchronous I/O kernel design
- run a non-Linux 64-bit OS in QEMU
- experiment with Linux API compatibility on a microkernel
- contribute to an open-source hobby operating system
- test software against a Linux-compatible but non-Linux kernel

## When to choose
- you want to explore or contribute to a microkernel OS with modern asynchronous I/O design
- you need a POSIX/Linux-compatible user space on a non-Linux kernel for research or testing
- you want a self-contained OS image to boot in QEMU on x86-64, aarch64, or riscv64

## When to avoid
- you need a production-ready daily-driver OS with broad hardware and application support
- you require a mature ecosystem, extensive driver coverage, or vendor support
- you just want a Linux distribution rather than an independent kernel

## Facets
- artifact type: application
- maturity: active
- function: concurrency, networking
- domain: operating-systems, developer-tools
- platform: -
- tags: microkernel, posix-compatible, asynchronous-io, modern-cpp, smp, usb3, linux-api-compatibility, operating-system, x86-64, aarch64, riscv, qemu

## Member repositories
- managarm/managarm (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:00.709803+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:05:10.055854+00:00, confidence not recorded.
  - readme: https://github.com/managarm/managarm (fetched 2026-08-28T04:06:00.709803+00:00, sha 5e7c00527023)
- Data as of 2026-08-30T08:39:29.467469+00:00.